全文获取类型
收费全文 | 1560104篇 |
免费 | 122952篇 |
国内免费 | 3896篇 |
专业分类
耳鼻咽喉 | 20529篇 |
儿科学 | 50590篇 |
妇产科学 | 43971篇 |
基础医学 | 220244篇 |
口腔科学 | 40903篇 |
临床医学 | 140857篇 |
内科学 | 315656篇 |
皮肤病学 | 35815篇 |
神经病学 | 132137篇 |
特种医学 | 58933篇 |
外国民族医学 | 472篇 |
外科学 | 232126篇 |
综合类 | 34780篇 |
现状与发展 | 6篇 |
一般理论 | 672篇 |
预防医学 | 121297篇 |
眼科学 | 35509篇 |
药学 | 108315篇 |
1篇 | |
中国医学 | 3531篇 |
肿瘤学 | 90608篇 |
出版年
2021年 | 13196篇 |
2019年 | 13973篇 |
2018年 | 19379篇 |
2017年 | 14683篇 |
2016年 | 16626篇 |
2015年 | 18820篇 |
2014年 | 26736篇 |
2013年 | 40022篇 |
2012年 | 54774篇 |
2011年 | 58009篇 |
2010年 | 33882篇 |
2009年 | 32353篇 |
2008年 | 53872篇 |
2007年 | 57126篇 |
2006年 | 57320篇 |
2005年 | 56005篇 |
2004年 | 53441篇 |
2003年 | 50962篇 |
2002年 | 49111篇 |
2001年 | 74213篇 |
2000年 | 75464篇 |
1999年 | 62868篇 |
1998年 | 18921篇 |
1997年 | 17127篇 |
1996年 | 17030篇 |
1995年 | 16092篇 |
1994年 | 14604篇 |
1993年 | 13701篇 |
1992年 | 46715篇 |
1991年 | 44285篇 |
1990年 | 42179篇 |
1989年 | 40236篇 |
1988年 | 36868篇 |
1987年 | 35954篇 |
1986年 | 33548篇 |
1985年 | 32044篇 |
1984年 | 24846篇 |
1983年 | 21003篇 |
1982年 | 13579篇 |
1981年 | 12058篇 |
1979年 | 21371篇 |
1978年 | 15340篇 |
1977年 | 12768篇 |
1976年 | 11951篇 |
1975年 | 12092篇 |
1974年 | 14492篇 |
1973年 | 13950篇 |
1972年 | 12957篇 |
1971年 | 11699篇 |
1970年 | 11100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Neetu Radhakrishnan M.D. Chong. H. Park M.D. Barry M. Kaplan M.D. F.A.C.C. Rajiv Jauhar M.D. F.A.C.C. 《The International journal of angiology》2006,15(1):37-42
A 65-year-old man developed acute limb ischemia, severe abdominal wall and lower limb livedo reticularis following a coronary
angiogram. The differential diagnoses of acute limb ischemia and multiple cholesterol emboli syndrome (MCES) are discussed.
This work was performed at Long Island Jewish Medical Center, 270-05, 76th Avenue, New Hyde Park, NY 11040. 相似文献
82.
83.
Jeffrey Schatz Robert Buzan 《Journal of the International Neuropsychological Society》2006,12(1):24-33
We assessed midsagittal corpus callosum size in sickle cell disease (SCD) and its relationship to lesion volume, lesion location, and cognitive functioning. Twenty-eight children with SCD and 16 demographic controls completed magnetic resonance imaging (MRI) and neuropsychological testing. Corpus callosum (CC) size was smaller for children with silent infarcts (n = 8) or overt stroke (n = 8) than for those without visible infarcts (n = 12) or control participants. Lesion volume was a robust predictor of IQ and other cognitive scores; total CC size did not typically add explanatory power for these measures. The size of the rostral body of the CC, however, independently predicted measures of distractibility, speeded production, and working memory. Posterior CC size was also decreased among many of the children with SCD, even in the absence of visible infarcts in this region. Brain morphology appears to provide additional information about SCD-related effects on the brain above and beyond visible infarcts. 相似文献
84.
85.
86.
87.
88.
Harvey A. Siegal PhD ; Paul J. Draus PhD ; Robert G. Carlson PhD ; Russel S. Falck MA ; Jichuan Wang PhD 《The Journal of rural health》2006,22(2):169-173
CONTEXT: Although the nonmedical use of stimulant drugs such as cocaine and methamphetamine is increasingly common in many rural areas of the United States, little is known about the health beliefs of people who use these drugs. PURPOSE: This research describes illicit stimulant drug users' views on health and health-related concepts that may affect their utilization of health care services. METHODS: A respondent-driven sampling plan was used to recruit 249 not-in-treatment, nonmedical stimulant drug users who were residing in 3 rural counties in west central Ohio. A structured questionnaire administered by trained interviewers was used to collect information on a range of topics, including current drug use, self-reported health status, perceived need for substance abuse treatment, and beliefs about health and health services. FINDINGS: Participants reported using a wide variety of drugs nonmedically, some by injection. Alcohol and marijuana were the most commonly used drugs in the 30 days prior to the interview. Powder cocaine was used by 72.3% of the sample, crack by 68.3%, and methamphetamine by 29.7%. Fair or poor health status was reported by 41.3% of the participants. Only 20.9% of the sample felt they needed drug abuse treatment. Less than one third of the sample reported that they would feel comfortable talking to a physician about their drug use, and 65.1% said they preferred taking care of their problems without getting professional help. CONCLUSIONS: Stimulant drug users in rural Ohio are involved with a range of substances and hold health beliefs that may impede health services utilization. 相似文献
89.
90.
JM Martín† L Calduch† C Monteagudo‡ I Molina† D Ramón† V Alonso† E Jordᆠ《Journal of the European Academy of Dermatology and Venereology》2006,20(4):428-431
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified. 相似文献